oj.uz

Submission #1006604

# Submission time Handle Problem Language Result Execution time Memory
1006604 2024-06-24T05:05:12 Z farrellw Wall (IOI14_wall) C++14
100 / 100
 421 ms 48976 KB 
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define INF 1000000
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;

#include "wall.h"

ii combine(ii upd_new, ii upd_old) {    // apply upd_new to upd_old
    ii res = {max(upd_new.fi, upd_old.fi), min(upd_new.se, upd_old.se)};
    if (res.fi > res.se) { // The ranges are disjoint, so suffices to check either
        res = (upd_old.se < upd_new.se) ? make_pair(upd_new.fi, upd_new.fi) : make_pair(upd_new.se, upd_new.se);
    }
    return res;
}

struct Segtree {    // Segtree of updates
    int sz;
    vector<ii> upd;    // store (a, b)
    Segtree(int N) {
        sz = 1;
        while (sz < N)
            sz *= 2;
        upd = vii(2 * sz, {0, INF});
    }
    void push(int id, int left, int right) { // O(1), for regular updates
        if (right - left == 1)
            return;
        upd[2 * id + 1] = combine(upd[id], upd[2 * id + 1]);
        upd[2 * id + 2] = combine(upd[id], upd[2 * id + 2]);
        upd[id] = {0, INF};
    }

    void push_recursive(int id, int left, int right) { // O(N), only for answer extraction at the end
        if(right - left == 1)
            return;
        push(id, left, right);
        int mid = (left + right) / 2;
        push_recursive(2 * id + 1, left, mid);
        push_recursive(2 * id + 2, mid, right);
    }

    void range_upd(int qleft, int qright, ii val, int id, int left, int right) {
        if (qleft <= left && right <= qright) {
            upd[id] = combine(val, upd[id]);
            return;
        }
        if (qright <= left || right <= qleft)
            return;
        push(id, left, right);
        int mid = (left + right) / 2;
        range_upd(qleft, qright, val, 2 * id + 1, left, mid);
        range_upd(qleft, qright, val, 2 * id + 2, mid, right);
    }
    void range_upd(int qleft, int qright, ii val) {
        range_upd(qleft, qright, val, 0, 0, sz);
    }
};

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]) {
    Segtree tree(n);
    for(int z = 0; z < k; z++) {
        ii upd_val = (op[z] == 1) ? make_pair(height[z], INF) : make_pair(0, height[z]);
        tree.range_upd(left[z], right[z]+1, upd_val);
    }
    tree.push_recursive(0, 0, tree.sz);
    for(int z = 0; z < n; z++) {
        finalHeight[z] = tree.upd[z+tree.sz-1].fi;
    }
    return;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 3 ms 604 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 3 ms 604 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 79 ms 8092 KB Output is correct
3 Correct 105 ms 4252 KB Output is correct
4 Correct 345 ms 10612 KB Output is correct
5 Correct 169 ms 10584 KB Output is correct
6 Correct 174 ms 10580 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 4 ms 604 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 3 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 79 ms 8096 KB Output is correct
9 Correct 107 ms 4136 KB Output is correct
10 Correct 339 ms 10576 KB Output is correct
11 Correct 166 ms 10580 KB Output is correct
12 Correct 166 ms 10576 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 80 ms 8020 KB Output is correct
15 Correct 20 ms 1368 KB Output is correct
16 Correct 354 ms 10576 KB Output is correct
17 Correct 197 ms 10576 KB Output is correct
18 Correct 178 ms 10568 KB Output is correct

Subtask #4
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 4 ms 604 KB Output is correct
5 Correct 3 ms 604 KB Output is correct
6 Correct 3 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 78 ms 8052 KB Output is correct
9 Correct 100 ms 4176 KB Output is correct
10 Correct 372 ms 10572 KB Output is correct
11 Correct 169 ms 10580 KB Output is correct
12 Correct 165 ms 10536 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 88 ms 8276 KB Output is correct
15 Correct 21 ms 1372 KB Output is correct
16 Correct 336 ms 10576 KB Output is correct
17 Correct 174 ms 10576 KB Output is correct
18 Correct 182 ms 10580 KB Output is correct
19 Correct 421 ms 48976 KB Output is correct
20 Correct 353 ms 48724 KB Output is correct
21 Correct 398 ms 48724 KB Output is correct
22 Correct 386 ms 48872 KB Output is correct
23 Correct 362 ms 48720 KB Output is correct
24 Correct 383 ms 48724 KB Output is correct
25 Correct 391 ms 48720 KB Output is correct
26 Correct 395 ms 48780 KB Output is correct
27 Correct 385 ms 48828 KB Output is correct
28 Correct 374 ms 48696 KB Output is correct
29 Correct 376 ms 48724 KB Output is correct
30 Correct 384 ms 48976 KB Output is correct